efifs.c revision 1.2.2.3
1 1.2.2.3 kardel /* $NetBSD: efifs.c,v 1.2.2.3 2006/06/01 22:34:54 kardel Exp $ */ 2 1.2.2.2 simonb 3 1.2.2.2 simonb /*- 4 1.2.2.2 simonb * Copyright (c) 2001 Doug Rabson 5 1.2.2.2 simonb * All rights reserved. 6 1.2.2.2 simonb * 7 1.2.2.2 simonb * Redistribution and use in source and binary forms, with or without 8 1.2.2.2 simonb * modification, are permitted provided that the following conditions 9 1.2.2.2 simonb * are met: 10 1.2.2.2 simonb * 1. Redistributions of source code must retain the above copyright 11 1.2.2.2 simonb * notice, this list of conditions and the following disclaimer. 12 1.2.2.2 simonb * 2. Redistributions in binary form must reproduce the above copyright 13 1.2.2.2 simonb * notice, this list of conditions and the following disclaimer in the 14 1.2.2.2 simonb * documentation and/or other materials provided with the distribution. 15 1.2.2.2 simonb * 16 1.2.2.2 simonb * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 1.2.2.2 simonb * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 1.2.2.2 simonb * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 1.2.2.2 simonb * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 1.2.2.2 simonb * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 1.2.2.2 simonb * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 1.2.2.2 simonb * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 1.2.2.2 simonb * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 1.2.2.2 simonb * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 1.2.2.2 simonb * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 1.2.2.2 simonb * SUCH DAMAGE. 27 1.2.2.2 simonb * 28 1.2.2.3 kardel * $FreeBSD: src/sys/boot/efi/libefi/efifs.c,v 1.8 2003/08/02 08:22:03 marcel Exp $ 29 1.2.2.2 simonb */ 30 1.2.2.2 simonb 31 1.2.2.2 simonb #include <sys/time.h> 32 1.2.2.2 simonb #include <sys/dirent.h> 33 1.2.2.2 simonb #include <lib/libsa/stand.h> 34 1.2.2.2 simonb #include <lib/libkern/libkern.h> 35 1.2.2.2 simonb #include <machine/stdarg.h> 36 1.2.2.2 simonb 37 1.2.2.2 simonb #include <efi.h> 38 1.2.2.2 simonb #include <efilib.h> 39 1.2.2.2 simonb 40 1.2.2.2 simonb #include <bootstrap.h> 41 1.2.2.2 simonb 42 1.2.2.2 simonb #include "efiboot.h" 43 1.2.2.2 simonb 44 1.2.2.2 simonb /* Perform I/O in blocks of size EFI_BLOCK_SIZE. */ 45 1.2.2.2 simonb #define EFI_BLOCK_SIZE (1024 * 1024) 46 1.2.2.2 simonb 47 1.2.2.2 simonb 48 1.2.2.2 simonb int 49 1.2.2.2 simonb efifs_open(const char *upath, struct open_file *f) 50 1.2.2.2 simonb { 51 1.2.2.2 simonb struct efi_devdesc *dev = f->f_devdata; 52 1.2.2.2 simonb static EFI_GUID sfsid = SIMPLE_FILE_SYSTEM_PROTOCOL; 53 1.2.2.2 simonb EFI_FILE_IO_INTERFACE *sfs; 54 1.2.2.2 simonb EFI_FILE *root; 55 1.2.2.2 simonb EFI_FILE *file; 56 1.2.2.2 simonb EFI_STATUS status; 57 1.2.2.2 simonb CHAR16 *cp; 58 1.2.2.2 simonb CHAR16 *path; 59 1.2.2.2 simonb 60 1.2.2.2 simonb /* 61 1.2.2.2 simonb * We cannot blindly assume that f->f_devdata points to a 62 1.2.2.2 simonb * efi_devdesc structure. Before we dereference 'dev', make 63 1.2.2.2 simonb * sure that the underlying device is ours. 64 1.2.2.2 simonb */ 65 1.2.2.2 simonb if (f->f_dev != &devsw[0] || dev->d_handle == NULL) 66 1.2.2.2 simonb return ENOENT; 67 1.2.2.2 simonb 68 1.2.2.2 simonb status = BS->HandleProtocol(dev->d_handle, &sfsid, (VOID **)&sfs); 69 1.2.2.2 simonb if (EFI_ERROR(status)) 70 1.2.2.2 simonb return ENOENT; 71 1.2.2.2 simonb 72 1.2.2.2 simonb /* 73 1.2.2.2 simonb * Find the root directory. 74 1.2.2.2 simonb */ 75 1.2.2.2 simonb status = sfs->OpenVolume(sfs, &root); 76 1.2.2.2 simonb 77 1.2.2.2 simonb /* 78 1.2.2.2 simonb * Convert path to CHAR16, skipping leading separators. 79 1.2.2.2 simonb */ 80 1.2.2.2 simonb while (*upath == '/') 81 1.2.2.2 simonb upath++; 82 1.2.2.2 simonb if (!*upath) { 83 1.2.2.2 simonb /* Opening the root directory, */ 84 1.2.2.2 simonb f->f_fsdata = root; 85 1.2.2.2 simonb return 0; 86 1.2.2.2 simonb } 87 1.2.2.2 simonb cp = path = alloc((strlen(upath) + 1) * sizeof(CHAR16)); 88 1.2.2.2 simonb if (path == NULL) 89 1.2.2.2 simonb return ENOMEM; 90 1.2.2.2 simonb while (*upath) { 91 1.2.2.2 simonb if (*upath == '/') 92 1.2.2.2 simonb *cp = '\\'; 93 1.2.2.2 simonb else 94 1.2.2.2 simonb *cp = *upath; 95 1.2.2.2 simonb upath++; 96 1.2.2.2 simonb cp++; 97 1.2.2.2 simonb } 98 1.2.2.2 simonb *cp++ = 0; 99 1.2.2.2 simonb 100 1.2.2.2 simonb /* 101 1.2.2.2 simonb * Try to open it. 102 1.2.2.2 simonb */ 103 1.2.2.2 simonb status = root->Open(root, &file, path, EFI_FILE_MODE_READ, 0); 104 1.2.2.2 simonb free(path); 105 1.2.2.2 simonb if (EFI_ERROR(status)) { 106 1.2.2.2 simonb root->Close(root); 107 1.2.2.2 simonb return ENOENT; 108 1.2.2.2 simonb } 109 1.2.2.2 simonb 110 1.2.2.2 simonb root->Close(root); 111 1.2.2.2 simonb f->f_fsdata = file; 112 1.2.2.2 simonb return 0; 113 1.2.2.2 simonb } 114 1.2.2.2 simonb 115 1.2.2.2 simonb int 116 1.2.2.2 simonb efifs_close(struct open_file *f) 117 1.2.2.2 simonb { 118 1.2.2.2 simonb EFI_FILE *file = f->f_fsdata; 119 1.2.2.2 simonb 120 1.2.2.2 simonb file->Close(file); 121 1.2.2.2 simonb return 0; 122 1.2.2.2 simonb } 123 1.2.2.2 simonb 124 1.2.2.2 simonb int 125 1.2.2.2 simonb efifs_read(struct open_file *f, void *buf, size_t size, size_t *resid) 126 1.2.2.2 simonb { 127 1.2.2.2 simonb EFI_FILE *file = f->f_fsdata; 128 1.2.2.2 simonb EFI_STATUS status; 129 1.2.2.2 simonb UINTN sz = size; 130 1.2.2.2 simonb char *bufp; 131 1.2.2.2 simonb 132 1.2.2.2 simonb bufp = buf; 133 1.2.2.2 simonb while (size > 0) { 134 1.2.2.2 simonb sz = size; 135 1.2.2.2 simonb if (sz > EFI_BLOCK_SIZE) 136 1.2.2.2 simonb sz = EFI_BLOCK_SIZE; 137 1.2.2.2 simonb status = file->Read(file, &sz, bufp); 138 1.2.2.2 simonb 139 1.2.2.2 simonb #if !defined(LIBSA_NO_TWIDDLE) 140 1.2.2.2 simonb twiddle(); 141 1.2.2.2 simonb #endif 142 1.2.2.2 simonb 143 1.2.2.2 simonb if (EFI_ERROR(status)) 144 1.2.2.2 simonb return EIO; 145 1.2.2.2 simonb if (sz == 0) 146 1.2.2.2 simonb break; 147 1.2.2.2 simonb size -= sz; 148 1.2.2.2 simonb bufp += sz; 149 1.2.2.2 simonb } 150 1.2.2.2 simonb if (resid) 151 1.2.2.2 simonb *resid = size; 152 1.2.2.2 simonb return 0; 153 1.2.2.2 simonb } 154 1.2.2.2 simonb 155 1.2.2.2 simonb int 156 1.2.2.2 simonb efifs_write(struct open_file *f, void *buf, size_t size, size_t *resid) 157 1.2.2.2 simonb { 158 1.2.2.2 simonb EFI_FILE *file = f->f_fsdata; 159 1.2.2.2 simonb EFI_STATUS status; 160 1.2.2.2 simonb UINTN sz = size; 161 1.2.2.2 simonb char *bufp; 162 1.2.2.2 simonb 163 1.2.2.2 simonb bufp = buf; 164 1.2.2.2 simonb while (size > 0) { 165 1.2.2.2 simonb sz = size; 166 1.2.2.2 simonb if (sz > EFI_BLOCK_SIZE) 167 1.2.2.2 simonb sz = EFI_BLOCK_SIZE; 168 1.2.2.2 simonb status = file->Write(file, &sz, bufp); 169 1.2.2.2 simonb 170 1.2.2.2 simonb #if !defined(LIBSA_NO_TWIDDLE) 171 1.2.2.2 simonb twiddle(); 172 1.2.2.2 simonb #endif 173 1.2.2.2 simonb 174 1.2.2.2 simonb if (EFI_ERROR(status)) 175 1.2.2.2 simonb return EIO; 176 1.2.2.2 simonb if (sz == 0) 177 1.2.2.2 simonb break; 178 1.2.2.2 simonb size -= sz; 179 1.2.2.2 simonb bufp += sz; 180 1.2.2.2 simonb } 181 1.2.2.2 simonb if (resid) 182 1.2.2.2 simonb *resid = size; 183 1.2.2.2 simonb return 0; 184 1.2.2.2 simonb } 185 1.2.2.2 simonb 186 1.2.2.2 simonb off_t 187 1.2.2.2 simonb efifs_seek(struct open_file *f, off_t offset, int where) 188 1.2.2.2 simonb { 189 1.2.2.2 simonb EFI_FILE *file = f->f_fsdata; 190 1.2.2.2 simonb EFI_STATUS status; 191 1.2.2.2 simonb UINT64 base; 192 1.2.2.2 simonb UINTN sz; 193 1.2.2.2 simonb static EFI_GUID infoid = EFI_FILE_INFO_ID; 194 1.2.2.2 simonb EFI_FILE_INFO info; 195 1.2.2.2 simonb 196 1.2.2.2 simonb switch (where) { 197 1.2.2.2 simonb case SEEK_SET: 198 1.2.2.2 simonb base = 0; 199 1.2.2.2 simonb break; 200 1.2.2.2 simonb 201 1.2.2.2 simonb case SEEK_CUR: 202 1.2.2.2 simonb status = file->GetPosition(file, &base); 203 1.2.2.2 simonb if (EFI_ERROR(status)) 204 1.2.2.2 simonb return -1; 205 1.2.2.2 simonb break; 206 1.2.2.2 simonb 207 1.2.2.2 simonb case SEEK_END: 208 1.2.2.2 simonb sz = sizeof(info); 209 1.2.2.2 simonb status = file->GetInfo(file, &infoid, &sz, &info); 210 1.2.2.2 simonb if (EFI_ERROR(status)) 211 1.2.2.2 simonb return -1; 212 1.2.2.2 simonb base = info.FileSize; 213 1.2.2.2 simonb break; 214 1.2.2.2 simonb } 215 1.2.2.2 simonb 216 1.2.2.2 simonb status = file->SetPosition(file, base + offset); 217 1.2.2.2 simonb if (EFI_ERROR(status)) 218 1.2.2.2 simonb return -1; 219 1.2.2.2 simonb file->GetPosition(file, &base); 220 1.2.2.2 simonb 221 1.2.2.2 simonb return base; 222 1.2.2.2 simonb } 223 1.2.2.2 simonb 224 1.2.2.2 simonb int 225 1.2.2.2 simonb efifs_stat(struct open_file *f, struct stat *sb) 226 1.2.2.2 simonb { 227 1.2.2.2 simonb EFI_FILE *file = f->f_fsdata; 228 1.2.2.2 simonb EFI_STATUS status; 229 1.2.2.2 simonb char *buf; 230 1.2.2.2 simonb UINTN sz; 231 1.2.2.2 simonb static EFI_GUID infoid = EFI_FILE_INFO_ID; 232 1.2.2.2 simonb EFI_FILE_INFO *info; 233 1.2.2.2 simonb 234 1.2.2.2 simonb bzero(sb, sizeof(*sb)); 235 1.2.2.2 simonb 236 1.2.2.2 simonb buf = alloc(1024); 237 1.2.2.2 simonb sz = 1024; 238 1.2.2.2 simonb 239 1.2.2.2 simonb status = file->GetInfo(file, &infoid, &sz, buf); 240 1.2.2.2 simonb if (EFI_ERROR(status)) { 241 1.2.2.2 simonb free(buf); 242 1.2.2.2 simonb return -1; 243 1.2.2.2 simonb } 244 1.2.2.2 simonb 245 1.2.2.2 simonb info = (EFI_FILE_INFO *) buf; 246 1.2.2.2 simonb 247 1.2.2.2 simonb if (info->Attribute & EFI_FILE_READ_ONLY) 248 1.2.2.2 simonb sb->st_mode = S_IRUSR; 249 1.2.2.2 simonb else 250 1.2.2.2 simonb sb->st_mode = S_IRUSR | S_IWUSR; 251 1.2.2.2 simonb if (info->Attribute & EFI_FILE_DIRECTORY) 252 1.2.2.2 simonb sb->st_mode |= S_IFDIR; 253 1.2.2.2 simonb else 254 1.2.2.2 simonb sb->st_mode |= S_IFREG; 255 1.2.2.2 simonb sb->st_size = info->FileSize; 256 1.2.2.2 simonb 257 1.2.2.2 simonb free(buf); 258 1.2.2.2 simonb return 0; 259 1.2.2.2 simonb } 260 1.2.2.2 simonb 261 1.2.2.2 simonb int 262 1.2.2.2 simonb efifs_readdir(struct open_file *f, struct dirent *d) 263 1.2.2.2 simonb { 264 1.2.2.2 simonb EFI_FILE *file = f->f_fsdata; 265 1.2.2.2 simonb EFI_STATUS status; 266 1.2.2.2 simonb char *buf; 267 1.2.2.2 simonb UINTN sz; 268 1.2.2.2 simonb EFI_FILE_INFO *info; 269 1.2.2.2 simonb int i; 270 1.2.2.2 simonb 271 1.2.2.2 simonb buf = alloc(1024); 272 1.2.2.2 simonb sz = 1024; 273 1.2.2.2 simonb 274 1.2.2.2 simonb status = file->Read(file, &sz, buf); 275 1.2.2.2 simonb if (EFI_ERROR(status) || sz < offsetof(EFI_FILE_INFO, FileName)) 276 1.2.2.2 simonb return ENOENT; 277 1.2.2.2 simonb 278 1.2.2.2 simonb info = (EFI_FILE_INFO *) buf; 279 1.2.2.2 simonb 280 1.2.2.2 simonb d->d_fileno = 0; 281 1.2.2.2 simonb d->d_reclen = sizeof(*d); 282 1.2.2.2 simonb if (info->Attribute & EFI_FILE_DIRECTORY) 283 1.2.2.2 simonb d->d_type = DT_DIR; 284 1.2.2.2 simonb else 285 1.2.2.2 simonb d->d_type = DT_REG; 286 1.2.2.2 simonb d->d_namlen = ((info->Size - offsetof(EFI_FILE_INFO, FileName)) 287 1.2.2.2 simonb / sizeof(CHAR16)); 288 1.2.2.2 simonb for (i = 0; i < d->d_namlen; i++) 289 1.2.2.2 simonb d->d_name[i] = info->FileName[i]; 290 1.2.2.2 simonb d->d_name[i] = 0; 291 1.2.2.2 simonb 292 1.2.2.2 simonb free(buf); 293 1.2.2.2 simonb return 0; 294 1.2.2.2 simonb } 295 1.2.2.2 simonb 296 1.2.2.2 simonb static EFI_HANDLE *fs_handles; 297 1.2.2.2 simonb UINTN fs_handle_count; 298 1.2.2.2 simonb 299 1.2.2.2 simonb int 300 1.2.2.2 simonb efifs_get_unit(EFI_HANDLE h) 301 1.2.2.2 simonb { 302 1.2.2.2 simonb UINTN u; 303 1.2.2.2 simonb 304 1.2.2.2 simonb u = 0; 305 1.2.2.2 simonb while (u < fs_handle_count && fs_handles[u] != h) 306 1.2.2.2 simonb u++; 307 1.2.2.2 simonb return ((u < fs_handle_count) ? u : -1); 308 1.2.2.2 simonb } 309 1.2.2.2 simonb 310 1.2.2.2 simonb int 311 1.2.2.2 simonb efifs_dev_init(void) 312 1.2.2.2 simonb { 313 1.2.2.2 simonb EFI_STATUS status; 314 1.2.2.2 simonb UINTN sz; 315 1.2.2.2 simonb static EFI_GUID sfsid = SIMPLE_FILE_SYSTEM_PROTOCOL; 316 1.2.2.2 simonb 317 1.2.2.2 simonb sz = 0; 318 1.2.2.2 simonb status = BS->LocateHandle(ByProtocol, &sfsid, 0, &sz, 0); 319 1.2.2.2 simonb if (status != EFI_BUFFER_TOO_SMALL) 320 1.2.2.2 simonb return ENOENT; 321 1.2.2.2 simonb fs_handles = (EFI_HANDLE *) alloc(sz); 322 1.2.2.2 simonb status = BS->LocateHandle(ByProtocol, &sfsid, 0, 323 1.2.2.2 simonb &sz, fs_handles); 324 1.2.2.2 simonb if (EFI_ERROR(status)) { 325 1.2.2.2 simonb free(fs_handles); 326 1.2.2.2 simonb return ENOENT; 327 1.2.2.2 simonb } 328 1.2.2.2 simonb fs_handle_count = sz / sizeof(EFI_HANDLE); 329 1.2.2.2 simonb 330 1.2.2.2 simonb return 0; 331 1.2.2.2 simonb } 332 1.2.2.2 simonb 333 1.2.2.2 simonb /* 334 1.2.2.2 simonb * Print information about disks 335 1.2.2.2 simonb */ 336 1.2.2.2 simonb void 337 1.2.2.2 simonb efifs_dev_print(int verbose) 338 1.2.2.2 simonb { 339 1.2.2.2 simonb int i; 340 1.2.2.2 simonb char line[80]; 341 1.2.2.2 simonb 342 1.2.2.2 simonb for (i = 0; i < fs_handle_count; i++) { 343 1.2.2.2 simonb sprintf(line, " fs%d: EFI filesystem", i); 344 1.2.2.2 simonb pager_output(line); 345 1.2.2.2 simonb /* XXX more detail? */ 346 1.2.2.2 simonb pager_output("\n"); 347 1.2.2.2 simonb } 348 1.2.2.2 simonb } 349 1.2.2.2 simonb 350 1.2.2.2 simonb /* 351 1.2.2.2 simonb * Attempt to open the disk described by (dev) for use by (f). 352 1.2.2.2 simonb * 353 1.2.2.2 simonb * Note that the philosophy here is "give them exactly what 354 1.2.2.2 simonb * they ask for". This is necessary because being too "smart" 355 1.2.2.2 simonb * about what the user might want leads to complications. 356 1.2.2.2 simonb * (eg. given no slice or partition value, with a disk that is 357 1.2.2.2 simonb * sliced - are they after the first BSD slice, or the DOS 358 1.2.2.2 simonb * slice before it?) 359 1.2.2.2 simonb */ 360 1.2.2.2 simonb int 361 1.2.2.2 simonb efifs_dev_open(struct open_file *f, ...) 362 1.2.2.2 simonb { 363 1.2.2.2 simonb va_list args; 364 1.2.2.2 simonb struct efi_devdesc *dev; 365 1.2.2.2 simonb int unit; 366 1.2.2.2 simonb 367 1.2.2.2 simonb va_start(args, f); 368 1.2.2.2 simonb dev = va_arg(args, struct efi_devdesc*); 369 1.2.2.2 simonb va_end(args); 370 1.2.2.2 simonb 371 1.2.2.2 simonb unit = dev->d_kind.efidisk.unit; 372 1.2.2.2 simonb if (unit < 0 || unit >= fs_handle_count) { 373 1.2.2.2 simonb printf("attempt to open nonexistent EFI filesystem\n"); 374 1.2.2.2 simonb return(ENXIO); 375 1.2.2.2 simonb } 376 1.2.2.2 simonb 377 1.2.2.2 simonb dev->d_handle = fs_handles[unit]; 378 1.2.2.2 simonb 379 1.2.2.2 simonb return 0; 380 1.2.2.2 simonb } 381 1.2.2.2 simonb 382 1.2.2.2 simonb int 383 1.2.2.2 simonb efifs_dev_close(struct open_file *f) 384 1.2.2.2 simonb { 385 1.2.2.2 simonb 386 1.2.2.2 simonb return 0; 387 1.2.2.2 simonb } 388 1.2.2.2 simonb 389 1.2.2.2 simonb int 390 1.2.2.2 simonb efifs_dev_strategy(void *devdata, int rw, daddr_t dblk, size_t size, void *buf, size_t *rsize) 391 1.2.2.2 simonb { 392 1.2.2.2 simonb return 0; 393 1.2.2.2 simonb } 394 1.2.2.2 simonb 395
Indexes created Wed Oct 15 07:09:58 GMT 2025